I use 3rd Party software to emulate keystrokes with a gamepad. DS4Windows software, using DS4 Playstation controller via Bluetooth. Everything has always worked fine until these 1.13 snapshots. The look-around (mouse) inputs are fine. The place/destroy blocks are fine, and the scrolling through the hotbar items are fine. No other command works. When in settings, controls, I will attempt to map a controller button and get something like 'scancode.256' or something, and it is the same regardless of what button I press. For an example, I have the 'Square' button on my controller mapped to the keystroke 'E' (open inventory in Minecraft). If I open Notepad and press Square, the letter 'e' shows up as expected. But when in game, nothing happens. If I go to controls options in Minecraft, find the open inventory line and select what key to map, I press the Square (which should be 'E') and it does not accept it, just 'scancode.256'.

I feel as if you guys were trying to implement some sort of native controller settings that got left unfinished, since the game is responding directly from my gamepad and not accepting the keystrokes that my software is outputting, which has not been the case from 1.12.2 and prior.